Hinged double telescope.



, E. DUNITZ HINGED DOUBLE TELESCOPE.

APPLICATION FILED MAR. 19, 1908.

ggg mgv Patented May 25, 19%;.

UNITED STATES PATENT oFEioE.

EMILDONITZ, OF JENA, GERMANY, A$SIGNOR ,TO THE FIRM GERMANY.

OF CARL ZEISS, 0F JENA,

. I HINGED noUBLE TELESCOPE.

To all whom it may concern.

- Be it known that I, EMIL Doni'rz, a citizen of the German Empire, and residing at Carl- Zeiss strasse, Jena, in the Grand Duchy of of that adjustment of the telescopes. Springs were proposed'in that patent as such securing ap )liances or as essential parts of them. Accor ing to the present improvement the same service is performed by a locking mechanism, for instance, a ratchet or friction device, which in adjustment of the telescopes is opened and closed automatically. Such a contrivancehas the advantage over the au tomatic securing spring, that a certain amount of hinge friction is no longer necessary in order to complete the securin effect.

If a spring ratchet device with suitab y faced teeth be employed, the shifting of its arts relatively to one another caused by a justment of the single telescopes effects opening and closing of-the ratchet device, each time the shifting by one tooth occurs. Locking mechanisms of other kinds allow of securing appliances being produced, inwhich opening and closing are only efiected at the beginning and at the end of the adjustment of the single telesco es, that is, in grasping and leaving hold 0 these telescopes. In order'to effect this, a lever for opening and a spring for clos ing the locking mechanism are suitably arranged.

, In the annexed drawing: Figure '1 is afront view of a hinged double telescope fitted with a locking'mechanism according to theinvention. Fig. 2 is a section-along the line 2-2 of Fig. 1., Fig. 3 is a front view of the same hinged double telescope, but fitted with another locking mechanism according to the Specification of Letters Patent.

scopes to the sleeve 0 sleeve 0 undergoes a disp Patented May 25, 1909.

Application filed March 19, 1908. Serial No. 422,122.

invention. Fig. fl. is a plan view ol'the telescope according to Fig. 3;

The arrangement according to Figs. 1 and 2 shows an automatic spring ratchet device asthe locking mechanism. A toothed upright a, which has its foot (1 standing on the hinge pin- 12' of the double telescope, serves as the one main part of the ratchet device. A sleeve 0, guided upon the upright a, with a s ring Icatch 0 attached thereto and two links (1 and e couplin the two single tcle i orm the other part of the ratchet device. Because of the suitably sloping faces provided not only on the teeth of the upright but also on the tooth of the catch, this tooth is successively forced out of the toothspaces in the upright, into which it enters one after another in consequence of the action of the catch s ring, when the acement up or down by adjusting the sing e telescopes.

The second arrangement'according to Figs.

3 and 4 shows a spring ratchet device with a releasing lever. A toothed sector f is firmly connected with the casin of the left telesco e, while the free end 0 a short arm 9 of a bel crank lever hinged to therightsingle telescope is fitted with catch teeth. From the axis h of said lever a longer arm i extends along the casing of the right single telescope.

A spring is presses the arm '8 away from the cas ng, by which action the ratchet device fg is closed. Gras ing the single telescopes, each with one han the right one presses the arm 11 down upon its spring k, so that the ratchet device is opened and the single telescopes maybe adjusted to the inter-pupilary distance. Leaving hold of the single telescopes after this adjustment closes the ratchet device again.

I claim 1. The combination, with a double telescope adapted to be used ona supporting device and comprising two. single 'telescopes hinged together for adjustment to the interpupilary distance, of a locking mechanism, independent of the supporting device, for securing said telescopes, in their adjusted position.

2. The combination, with a, double teleism being fitted to one and the other to the scopea'daptedto beu sedonga supporting deother single telescope and the retchet teeth in vice and comprising two, single telescopes having sloping faces.

hinged together for adjustment to the inter- 5 pupilary' distance, of a spring ratchet mechanisrn, independent of the supporting device, I for securing said telescopes in their adjusted position, one part of the said ratchet mechan- EMIL 1) "')N1TZ.

Witnesses: I

PAUL KRUGER, FRrrz" Sim; DER. 

